Pump valve



Feb. 15, 1960 s, BANCRQFT I 2,925,094

PUMP VALVE Filed Feb. 16. 1956 IE l 10 A7 T ORNEY United States Patent PUMP VALVE Howard S. Bancroft, Sharon, Pa. Application February 16, 1956, Serial No. 565,945 1 Claim. (Cl. 137-62518) This invention relates to a pump valve and more particularly to a pump valve which may be incorporated l1 in a cylindrical pump for reciprocating-movement in a cylinder which is particularly adapted for use in oppositely disposed pairs.

The principal object of the invention is the provision of a pump valve construction which may be applied to the end of a tubular member mounted in a cylinder and reciprocated to form an effective pump capable of handling liquids, sludges and the like.

A further object of the invention is the provision of a pump valve arranged to provide a plurality of straightthrough open passageways when in open position and a multi-surfaced closure of said passageways when in closed position.

A still further object of the invention is the provision of a pump valve which may be readily manufactured and easily assembled for operation.

The pump valve disclosed herein comprises an improvement in the art relating to reciprocating pump valves in that the valve provides a plurality of straight-through openings when open and quickly moves to effect multiple registry of a plurality of valve elements in the plurality of openings when in closed position.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being the intention to cover all changes and modifications of the example of the invention herein chosen for purposes of the disclosure, which do not constitute departures from the spirit and scope of the invention.

The invention is illustrated in the accompanying drawing, wherein:

Figure 1 is a side view of a pump valve with parts broken away and parts in cross section.

Figure 2 is an end view taken on the right end of Figure 1.

Figure 3 is a vertical section taken on line 3-3 of Figure 2.

Figure 4 is an exploded perspective view showing the pump valve in detail.

Figure 5 is a side view of the pump valve in a pump.

By referring to the drawing and Figure 1 in particular it will be seen that a pump valve comprising a flanged apertured cap having a disc 11 rotatably and reciprocally mounted therein is positioned in one end of a tubular member 12.

The flanged apertured cap 10 has a circular boss 13 centrally thereof which is provided with a passageway 14 therethrough, as best shown in Figures 3 and 4 of the drawing, and a shaft 15 is reciprocally positioned in the passageway 14 and fitted with a collar 16 adjacent its outermost end which is secured thereto by a fastener 17.

The shaft 15 is secured to the disc 11 and extends longitudinally through the tubular body 12 and through an apertured cap 10A.

The flange portion of the flanged apertured cap 10,

2. which is indicated bythe numeral 20, is provided a plurality of guide slots 21, each of which has a portion extending at right angles to the face of the flanged apertured cap 10 and a connecting portion extending at an angle with respect thereto.

A plurality of pins 22 formed on the periphery of the apertured disc 11 slidably engage the guide slots 21 so that reciprocating movement imparted to the apertured disc 11 causes it to move longitudinally of the tubular member 12 and then toturn with respect thereto thus bringing a plurality of apertures 23 therein into longi-' tudinal alignment with a plurality of apertures 24 in the cap10." I V a v Between each of the radially extending circumferentially spaced apertures 24 in the cap 10 there are inwardly extendingradially positioned circumferentially spaced bosses 25 which are valve elements, and the disc'll is pro vided with a similar plurality of outwardly and radially extending circumferentially spaced elongated bosses 26 which are also valve elements. When the disc 11 is in position adjacent the cap 10, as shown in Figure 3 of the drawing, the bosses 25, which are the valve elements on the cap 10, are received in registry with the plurality of apertures 23 in the disc 11 while the plurality of bosses 26, which are the valve elements on the disc 11, are received in registry in the plurality of apertures 24 in the cap 10 thus forming an air and liquid-tight closure.

In Figure 4 of the drawings the bosses or valve elements 25 and 26 are shown in oppositely disposed spaced relation, and it will occur to those skilled in the art that axial movement of the disc 11 will cause it and the bosses 26 to move straight away from the apertures 24 in the cap 10 until the inner adjacent surfaces of the bosses 25 and 26 clear, at which time the disc 11 will begin to turn to a position wherein the bosses 25 and 26 are in longitudinal alignment as are the apertures 23 and 24 thereby providing straight-through openings in the pump valve.

It will occur to those skilled in the art that when the tubular member 12 and the pump valve disclosed herein are assembled, as shown in Figures 1 and 5 of the drawing, the assembly comprises a hollow plunger of a pump and that when it is moved alternately back and forth in a valved cylinder (see Figure 5) it becomes an effective pumping medium as the apertures in the disc 11 are alternately opened and closed with respect to the apertures in theocap 10. Thus, as shown in Figure 1 of the drawing for example, a suction stroke from left to right has just been completed and the assembly has started to travel from right to left. The motion, which is imparted to the assembly through the shaft 15 as by a longitudinal extension thereof, has moved the shaft 15 to the left thereby' closed herein may be used on either end of a tubular member to form a hollow plunger which when positioned in a valved cylinder or the like and reciprocated forms an effective pump capable of desirable action and at the same time enables material to flow freelytherethrough due to the longitudinal alignment of the apertures in the valve parts when the same are in open relation.

It will also be observed by those skilled in the art that the positive closure and suction of such a pump is insured by the formation of the pump valve disclosed herein due *Pat'ented Feb. '16, 1960 to the unique formation of the bosses 25 and 26 which in effect form valve elements registrable with the apertures in the cap and disc, respectively, of the pump valve.

It will thus be seen that the several objects of the invention have been met by the pump valve disclosed herein,

Having thus described my invention, What I claim is:

A hollow plunger for a pump comprising a cylindrical member having a pump valve on one end thereof, said pump valve comprising a cap having a flange engaging an end of said cylindrical member, said cap having circumferentially spaced apertures therein, a disc having circumferentially spaced apertures therein disposed adjacent said cap within said flange, sloped cam slots in said flange and slot engaging formations on the periphery of said disc engaged in said sloped cam slots for imparting 15 an initial reciprocatory and subsequent turning motionto said disc when said disc is moved toward and away from said cap, and means for moving said disc with respect to said cap, said cap having bosses disposed one between each of said apertures, and said'disc having bosses dis- 20 posed one between each of said aperturesdherein, the

bosses on the cap registering with the apertures in the disc and the bosses on the disc registering with the apertures in the cap when said cap and disc are in position adjacent one another so as to form a liquid-tight seal, said initial reciprocatory motion from the closed position being effective to disengage said bosses from their respective apertures and said subsequently turning motion of said disc caused by said sloped, cam -slots being effective to disengage said bosses and their respective apertures so as to provide clear flow cha'miels through said disc and cap. 7

References Cited in the file of this patent.

UNITED T RATENTS 635,516 Simmons Oct. 24, 1899 1,823,918 Shew Sept. 22, 1931 2,269,031 MacArthur Jan. 6, 1942 FOREIGN PATENIS 632,829 Great Britain Dec, 5, 1949 

